High7.8Red Hat & Ubuntu Linux
X.Org X server: Use-after-free vulnerability leads to server crash and potential memory corruption
CVE-2026-34001 Published Apr 23, 2026
CVE-2026-34001
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
X.Org X server: Use-after-free vulnerability leads to server crash and potential memory corruption. Red Hat rates this important (CVSS 7.8). Weakness: CWE-825. Affected package(s): tigervnc, xorg-x11-server-Xwayland, xorg-x11-server. Resolved in Red Hat advisory RHSA-2026:24341 — update the affected packages (`sudo dnf update`).
Affected versions
- tigervnc-0:1.11.0-8.el8_4.15
- xorg-x11-server-Xwayland-0:21.1.3-10.el9_2
- tigervnc-0:1.14.1-10.el9_6
- tigervnc-0:1.15.0-6.el9_7.1
- xorg-x11-server-Xwayland-0:21.1.3-2.el8_6.6
- xorg-x11-server-0:1.20.11-34.el9_8
- tigervnc-0:1.15.0-7.el9_8.1
- xorg-x11-server-Xwayland-0:24.1.5-6.el10_1
- xorg-x11-server-0:1.20.11-20.el9_2
- xorg-x11-server-Xwayland-0:24.1.5-6.el10_0
- tigervnc-0:1.12.0-15.el8_8.17
- xorg-x11-server-Xwayland-0:21.1.3-5.el9_0
Official advisory · high-confidence parse· fetched 5 hours ago·verify at source
Fixed versions
- RHSA-2026:24341
Official advisory · high-confidence parse· fetched 5 hours ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Update the affected package(s) to the fixed version shipped in RHSA-2026:24341 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 5 hours ago·verify at source
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